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    Investigation of the effects of semantic neighbours in aphasia: a facilitated naming study

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    Access Status
    Open access
    Authors
    Hameau, Solène
    Biedermann, Britta
    Fieder, Nora
    Nickels, Lyndsey
    Date
    2019
    Type
    Journal Article
    
    Metadata
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    Citation
    Hameau, S. and Biedermann, B.-A. and Fieder, N. and Nickels, L. 2019. Investigation of the effects of semantic neighbours in aphasia: a facilitated naming study. Aphasiology. 34 (7): pp. 840-864.
    Source Title
    Aphasiology
    DOI
    10.1080/02687038.2019.1652241
    ISSN
    0268-7038
    Faculty
    Faculty of Health Sciences
    School
    School of Occupational Therapy, Social Work and Speech Pathology
    Remarks

    This is an accepted manuscript of an article published by Taylor & Francis in Aphasiology on 17/08/2019 available online at http://www.tandfonline.com/10.1080/02687038.2019.1652241

    URI
    http://hdl.handle.net/20.500.11937/76231
    Collection
    • Curtin Research Publications
    Abstract

    Background: It is well established that word retrieval can be improved in people with aphasia. However, there has been little research regarding the influence of specific word properties on the success of such treatment. Aims: This study aimed to better understand the mechanisms supporting naming treatment effects in aphasia, by exploring effects of word-specific semantic neighbourhood variables (based on featural overlap or on association strength) on the outcomes of a facilitation task. Methods And Procedures: Two individuals, one with primarily lexical-semantic difficulties (SJS) and one with primarily lexical difficulties (DEH) participated. Their picture naming performance was assessed before and after a facilitation task in which each target word was repeated in the presence of the corresponding picture. Outcomes And Results: Both participants showed improved naming following the facilitation task. However, for DEH, inhibitory effects of words with many semantic neighbours were enhanced by the facilitation task. For SJS, in contrast, targets with a strongly associated word in the lexicon were less likely to result in a semantic error compared to those with an associate of weaker association strength. Conclusions: It is hypothesised that individuals like DEH, with lexical retrieval impairments, may show increased sensitivity to neighbourhood density, whereas individuals like SJS, with an impairment of the links between semantics to lemmas, may show sensitivity to other neighbourhood measures that are more likely to be encoded at the semantic level.

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